[3] Captain Craig Collins is presumed killed when his spacecraft, Ship 534, disappears during a successful UFO attack to disable SID (the Space Intruder Detector, the early warning satellite).
During a training weightlifting session, Collins seemingly accidentally injures his co-pilot Col. Paul Foster, leaving Straker as the only qualified person available to replace him.
[4] Review website AnorakZone.com ranks "The Man Who Came Back" the ninth-best episode of UFO, praising Nesbitt's guest role as a "real fun addition to what could otherwise have been a pedestrian 'alien control' plot".
Calling the episode "tense and successful", Muir praises the special effects shots of the UFO attack on SID as well as the "delightful performance" of Nesbitt.
However, he criticises Straker's characterisation, arguing that his inaction over Collins makes him appear a weak leader.